A Ping-Pong Ball Covered with a Conducting Graphite Coating Has

question 76

Multiple Choice

A ping-pong ball covered with a conducting graphite coating has a mass of 5.0 x 10^-3 kg and a charge of 4.0 µC.What electric field directed upward will exactly balance the weight of the ball? (g = 9.8 m/s²)

• A)8.2 x 10² N/C
• B)1.2 x 10⁴ N/C
• C)2.0 x 10^-7 N/C
• D)5.1 x 10⁶ N/C

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